Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 522
Fig. 394. tube, reaching nearly to the bottom of the outer closed tube,and held in place by fins or lugs. The diameter of this innertube is so chosen as to leave an annular space all aroundbetween the two tubes, which is to be the channel for ascend- TYPES OF BOILERS. 467 ing currents of steam-gas… … into the drum. It is expected also that the circulation anddescent of the water in the inner tube shall be so rapid andvigorous as to wash out any sediment or scale from the bottom 468 MECHANICAL ENGINEERING OF POWER PLANTS. of the outer tube where its presence would result in a burningof the tube.…
Mechanical engineering · Steam power plants
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